T H E E L E M E N T S |
Book VI Proposition 14 | |
For since, as DB is to BE, so is GB to BF, while, as DB is to BE, so is the parallelogram AB to the parallelogram FE, [VI.I] and as GB is to BF, so is the parallelogram BC to the parallelogram FE, [VI.I] therefore also, as AB is to FE, so is BC to FE; [V.11] |
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